Compilare: user.cpp: In member function ‘bool Graph::checkVertex(int, int)’: user.cpp:31:14: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] return b == (a<<1)&(size-1) || b == ((a<<1)|1)&(size-1); ^ user.cpp:31:38: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] return b == (a<<1)&(size-1) || b == ((a<<1)|1)&(size-1); ^